Pulper for waste wood and waste paper.



M. E. PARK. PULRER FOR WASTE WOOD AND WASTE PAPER.

APPLICATION FILED FEB.12. i916.

Patented Dec; 5, 1916.

WY TNE55E5. W (5- 4- MILES E. PARK, OF TORONTO, ONTARIO, CANADA.

curios.

PULPER FOR WASTE WOOD AND WASTE PAPER.

memos.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed February 12, 1916. Serial No. 78,038.

To all whom it may concern Be it known that I, Minus E. PARK, of the city of Toronto, in the county of York and Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain new and useful Im rovements 1n Pulpers for.Waste Wood an Waste Paper, of which the following is a specification.

My invention is to devise apparatus capable of grinding and pulping waste wood and paper for use inpaper-making, which will efficiently and economically perform its work.

l attain my object by means of a construction which may be briefly described as follows: A frusto-conical rotatable grinding surface is supported in a horizontal position. A frusto-conical hopper is support ed above the grinding surface to act as a feeder, being suitably spaced therefrom for the exit of the pulp, means being provided for adjusting the space. removably supported within the hopper to form an annular feed space and which may be employed when wood is being pulped. Means are also provided for flushing out the ground pulp.

The whole is constructed in detail as hereinafter more particularly described and illustrated in the accompanying drawings in which Figure 1 is a vertical section of my improved pulper; Fig. 2 a plan view of the grinding surface, and Fig. 8 a cross section of part of the same.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 represents the frame,on which is suitably journaled the vertical shaft 2, which carries a table 3 adapted to support the grinding surface, 4. This grinding surface is frusto-conical in form, inclined outwardly, and is provided with ribs or ridges 14. These ribs are preferably radially curved as shown in the plan view. Each rib is also preferably tapered so that it dies out at the outer rim of the grinding surface. In cross section these ribs are roughly wedge-shaped, as shown in the section, the rearward surface being more abrupt than the forward surface to give better clearance for the outer movement of the ground pulp.

While any grinding material possessing the necessary hardness and cutting power may A central tube is' be employed, carborundum would be the best for my purposes.

Centrally on the table is formed a hollow cone 5 with which communicates the vertical pipe 6 through which water may be led or forced into the interior of the cone. This water escapes through a series of perforations 7 on to the grinding surface and serves to flush out the ground material. Such pressure may be employed as seems necessary to effectively remove the ground material.

On the frame workis supported an annular trough 8 to receive the ground material washed from the grinding surface. A spout 9 is provided leading from this trough. Above the grinding surface a frusto-conical hopper 10 is supported, the taper of the hopper being inwardly and upwardly and its lower edge lying a short distance above the outer edge of the grinding surface. The lower edge of the hopper is provided with the depending skirt 11, vertically adjustable by means of the screws 12. The gap between the skirt and the edge of the grinding surface may thus be adjusted to control the delivery of the pulp from the grinding surface.

With some classes of material it is desirable that the product be ground between two abrasive surfaces to prevent partially ground rolls orstrings of material escaping. The skirt 11 is therefore provided with an annulus 20 of abrasive material set in a paper is being ground this tube may be omitted.

A shaft 2 is carried by the upper ball bearings 16 and the ball step bearing 17. The shaft may be driven in any suitable manner. I show it driven from th main shaft 18 by means of the bevel gear ng 19,

When the hopper has been properly supplied with material to be ground, the apparatus is set in motion, and while the apparatus is in motion water is preferably continuously fed to the interior of the cone 5. The wood or paper is ground and dis charged as already described, the quality and output being controlled by the adjustment of the skirt 11.

This device, it will be seen, will be capable of handling the waste wood which cannot satisfactorily be handled by ordinary grinders and also operates effectively on waste paper.

It will be understood, of course, that in practice the details of construction may be considerably varied without departing from the spirit of my invention.

What I claim as my invention is:

1. In a machine for pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular hopper supported above and with its lower end spaced from said surface; and a central cone ex tending up within the inner boundary of the grinding surface and forming with the hopper an annular feeding space having its horizontal cross sectional area decreasing from top to bottom.

2. In a machine for pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular hopper supported above and with its lower end spaced from said surface; and a hollow central cone extending up within the inner boundary of the grinding surface and provided with an inlet at its apex and a series of outlets adjacent the grinding surface.

3. In a machine for pulping vegetable fiber the combination of a frusto-conical, annular, rotary grinding surface; a tubular frusto-conical hopper supported above and with its lower end spaced from said surface; and a central cone extending up within the inner boundary of the grinding surface and forming with the hopper an annular feeding space having its horizontal cross sectional area decreasin from top to bottom.

4:.In a machine or pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular hopper supported above and with its lower end spaced from said surface; a central cone extending up within the inner boundary of the grinding surface; and a central tube adapted 'to rest on the cone and extending up within the hopper. I

5. In a machine for pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular hopper supported above and with its lower end spaced from said surface; a central cone extending up within the inner boundary of the grinding surface; and a skirt adjustably secured to the hopper whereby the space aforesaid may be varied.

6. In a machine for pulping vegetable fiber the combination of a frusto-conical, annular, rotary grinding surface provided with curved radial ribs; a tubular hopper supported above and with its lower end spaced from said surface; and a central cone extending up within the inner boundary of the grinding surface.

7. In a machine for pulping vegetable fiber the combination of a frusto-conical, annular, rotary grinding surface provided with curved radial ribs roughly wedge-shaped in cross section and dying out toward the outer rim of the surface; a tubular hopper supported above and with its lower end spaced from said surface; and a central cone extending up within the inner boundary of the grinding surface. S. In a machine for pulping vegetable fiber the combination of a frusto-conical, annular, rotary grinding surface provided with curved radial ribs roughly Wedgeshaped in cross section and dying out toward the outer rim of the surface, the rear side of the wedge being more abrupt than the forward side; a tubular hopper supported above and with its lower end spaced from said surface; and a central cone extending up within the inner boundary of the grinding surface.

9. In a machine for pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular ho per supported above and with its lower enc spaced from said surface; a central cone extending up within the inner boundary of the grinding surface; a skirt adjustably secured to the hopper whereby the space aforesaid may be varied; and an annulus of abrasive material carried by said skirt over'the outer part of the grinding surface.

10. In a machine for pulping vegetable fiber the combination of an annular rotary grinding surface; a tubular hopper sup-' ported above and with its lower end spaced from said surface; a central cone extending up within the inner boundary of the grinding surface; a central tube adapted to rest on the cone and extending up within the hopper; and an annulus of abrasive material supported just above the outer part of the grinding surface. Signed at Toronto, Ont, this 7th day 0 February, A. D. 1916, in the presence of the two undersigned witnesses.

MILES E. PARK. 

